hhctrl.ocx: Do not try to dereference NULL pointer if CreateHelpViewer failed.
[wine/wine64.git] / dlls / hhctrl.ocx / hhctrl.c
blob958edf93fb15c48e51b652350495daf746fcf380
1 /*
2 * hhctrl implementation
4 * Copyright 2004 Krzysztof Foltman
5 * Copyright 2007 Jacek Caban for CodeWeavers
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/debug.h"
24 #define INIT_GUID
25 #include "hhctrl.h"
27 WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
29 HINSTANCE hhctrl_hinstance;
30 BOOL hh_process = FALSE;
32 BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD fdwReason, LPVOID lpvReserved)
34 TRACE("(%p,%d,%p)\n", hInstance, fdwReason, lpvReserved);
36 switch (fdwReason)
38 case DLL_PROCESS_ATTACH:
39 hhctrl_hinstance = hInstance;
40 DisableThreadLibraryCalls(hInstance);
41 break;
42 case DLL_PROCESS_DETACH:
43 break;
45 return TRUE;
48 static const char *command_to_string(UINT command)
50 #define X(x) case x: return #x
51 switch (command)
53 X( HH_DISPLAY_TOPIC );
54 X( HH_DISPLAY_TOC );
55 X( HH_DISPLAY_INDEX );
56 X( HH_DISPLAY_SEARCH );
57 X( HH_SET_WIN_TYPE );
58 X( HH_GET_WIN_TYPE );
59 X( HH_GET_WIN_HANDLE );
60 X( HH_ENUM_INFO_TYPE );
61 X( HH_SET_INFO_TYPE );
62 X( HH_SYNC );
63 X( HH_RESERVED1 );
64 X( HH_RESERVED2 );
65 X( HH_RESERVED3 );
66 X( HH_KEYWORD_LOOKUP );
67 X( HH_DISPLAY_TEXT_POPUP );
68 X( HH_HELP_CONTEXT );
69 X( HH_TP_HELP_CONTEXTMENU );
70 X( HH_TP_HELP_WM_HELP );
71 X( HH_CLOSE_ALL );
72 X( HH_ALINK_LOOKUP );
73 X( HH_GET_LAST_ERROR );
74 X( HH_ENUM_CATEGORY );
75 X( HH_ENUM_CATEGORY_IT );
76 X( HH_RESET_IT_FILTER );
77 X( HH_SET_INCLUSIVE_FILTER );
78 X( HH_SET_EXCLUSIVE_FILTER );
79 X( HH_INITIALIZE );
80 X( HH_UNINITIALIZE );
81 X( HH_SAFE_DISPLAY_TOPIC );
82 X( HH_PRETRANSLATEMESSAGE );
83 X( HH_SET_GLOBAL_PROPERTY );
84 default: return "???";
86 #undef X
89 /******************************************************************
90 * HtmlHelpW (hhctrl.ocx.15)
92 HWND WINAPI HtmlHelpW(HWND caller, LPCWSTR filename, UINT command, DWORD_PTR data)
94 TRACE("(%p, %s, command=%s, data=%lx)\n",
95 caller, debugstr_w( filename ),
96 command_to_string( command ), data);
98 switch (command)
100 case HH_DISPLAY_TOPIC:
101 case HH_DISPLAY_TOC:
102 case HH_DISPLAY_SEARCH:{
103 HHInfo *info;
104 BOOL res;
106 FIXME("Not all HH cases handled correctly\n");
108 info = CreateHelpViewer(filename);
110 if (info)
112 res = NavigateToChm(info, info->pCHMInfo->szFile, info->WinType.pszFile);
113 if(!res)
114 ReleaseHelpViewer(info);
117 return NULL; /* FIXME */
119 case HH_HELP_CONTEXT: {
120 HHInfo *info;
121 LPWSTR url;
123 info = CreateHelpViewer(filename);
124 if(!info)
125 return NULL;
127 url = FindContextAlias(info->pCHMInfo, data);
128 if(!url)
129 return NULL;
131 NavigateToUrl(info, url);
132 hhctrl_free(url);
134 return NULL; /* FIXME */
136 default:
137 FIXME("HH case %s not handled.\n", command_to_string( command ));
140 return 0;
143 /******************************************************************
144 * HtmlHelpA (hhctrl.ocx.14)
146 HWND WINAPI HtmlHelpA(HWND caller, LPCSTR filename, UINT command, DWORD_PTR data)
148 WCHAR *wfile = NULL, *wdata = NULL;
149 DWORD len;
150 HWND result;
152 if (filename)
154 len = MultiByteToWideChar( CP_ACP, 0, filename, -1, NULL, 0 );
155 wfile = hhctrl_alloc(len*sizeof(WCHAR));
156 MultiByteToWideChar( CP_ACP, 0, filename, -1, wfile, len );
159 if (data)
161 switch(command)
163 case HH_ALINK_LOOKUP:
164 case HH_DISPLAY_SEARCH:
165 case HH_DISPLAY_TEXT_POPUP:
166 case HH_GET_LAST_ERROR:
167 case HH_GET_WIN_TYPE:
168 case HH_KEYWORD_LOOKUP:
169 case HH_SET_WIN_TYPE:
170 case HH_SYNC:
171 FIXME("structures not handled yet\n");
172 break;
174 case HH_DISPLAY_INDEX:
175 case HH_DISPLAY_TOPIC:
176 case HH_DISPLAY_TOC:
177 case HH_GET_WIN_HANDLE:
178 case HH_SAFE_DISPLAY_TOPIC:
179 len = MultiByteToWideChar( CP_ACP, 0, (const char*)data, -1, NULL, 0 );
180 wdata = hhctrl_alloc(len*sizeof(WCHAR));
181 MultiByteToWideChar( CP_ACP, 0, (const char*)data, -1, wdata, len );
182 break;
184 case HH_CLOSE_ALL:
185 case HH_HELP_CONTEXT:
186 case HH_INITIALIZE:
187 case HH_PRETRANSLATEMESSAGE:
188 case HH_TP_HELP_CONTEXTMENU:
189 case HH_TP_HELP_WM_HELP:
190 case HH_UNINITIALIZE:
191 /* either scalar or pointer to scalar - do nothing */
192 break;
194 default:
195 FIXME("Unknown command: %s (%d)\n", command_to_string(command), command);
196 break;
200 result = HtmlHelpW( caller, wfile, command, wdata ? (DWORD_PTR)wdata : data );
202 hhctrl_free(wfile);
203 hhctrl_free(wdata);
204 return result;
207 /******************************************************************
208 * doWinMain (hhctrl.ocx.13)
210 int WINAPI doWinMain(HINSTANCE hInstance, LPSTR szCmdLine)
212 MSG msg;
214 hh_process = TRUE;
216 /* FIXME: Check szCmdLine for bad arguments */
217 HtmlHelpA(GetDesktopWindow(), szCmdLine, HH_DISPLAY_TOPIC, 0);
219 while (GetMessageW(&msg, 0, 0, 0))
221 TranslateMessage(&msg);
222 DispatchMessageW(&msg);
225 return 0;
228 /******************************************************************
229 * DllGetClassObject (hhctrl.ocx.@)
231 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
233 FIXME("(%s %s %p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
234 return CLASS_E_CLASSNOTAVAILABLE;